A compact membrane-driven diamond anvil cell and cryostat system for nuclear resonant scattering at high pressure and low temperature

Abstract

A new miniature panoramic diamond anvil cell (mini-pDAC) as well as a unique gas membrane-driven mechanism is developed and implemented to measure electronic, magnetic, vibrational, and thermodynamic properties of materials using the nuclear resonant inelastic X-ray scattering (NRIXS) and the synchrotron Mössbauer spectroscopy (SMS) simultaneously at high pressure (over Mbar) and low temperature (T < 10 K). The gas membrane system allows in situ pressure tuning of the mini-pDAC at low temperature. The mini-pDAC fits into a specially designed compact liquid helium flow cryostat system to achieve low temperatures, where liquid helium flows through the holder of the mini-pDAC to cool the sample more efficiently. The system has achieved sample temperatures as low as 9 K. Using the membrane, sample pressures of up to 1.4 Mbar have been generated from this mini-pDAC. The instrument has been routinely used at 3-ID, Advanced Photon Source, for NRIXS and SMS studies. The same instrument can easily be used for other X-ray techniques, such as X-ray radial diffraction, X-ray Raman scattering, X-ray emission spectroscopy, and X-ray inelastic scattering under high pressure and low temperature. In this paper, technical details of the mini-pDAC, membrane engaging mechanism, and the cryostat system are described, and some experimental results are discussed.

Pressure effect on magnetism and valence in ferromagnetic superconductor Eu(Fe0.75Ru0.25)2As2

“…This timing window is several lifetimes (14.1 ns) of the 151 Eu transition, allowing accurate determination of hyperfine parameters. A gas membranedriven miniature panoramic diamond anvil cell was used in a specially designed helium-flow cryostat [35]. One pair of diamond anvils of 500 µm culet was used to generate pressure up to 27.4 GPa.…”

Bandwidth controlled insulator-metal transition in BaFe2S3 : A Mössbauer study under pressure

“…The SMS experiments were conducted at the beamline 3ID-B of the Advanced Photon Source, Argonne National Laboratory, USA. The measurements were conducted between 10 and 200 K and 1.4 and 9.9 GPa using a special He-flow cryostat and a miniature diamond anvil cell [15,16]. Daphne oil 7575 was used as the pressure transmitting medium to ensure quasi-hydrostatic pressure conditions.…”

Robust magnetism and crystal structure in Dirac semimetal EuMnBi2 under high pressure

“…The time-domain data was collected using 24-bunch timing mode with 153 ns intervals between the consecutive electron bunches. A miniature diamond anvil cell (DAC) and a compatible helium flow cryostat were utilized to achieve high pressure and low temperature [34]. A single crystal sample was loaded in the DAC.…”